Full Text Journal Articles by
Author Elif Demir

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Abdominal palpation and percussion maneuvers do not affect bowel sounds.

Ayşe Sena Çalış, Esra Kaya, Lijana Mehmetaj, Büşra Yılmaz, Elif Nurdan Demir, Derya Öztuna, Evren Üstüner, Halil İbrahim Açar, Serhat Tokgöz, Muzaffer Akkoca, Mehmet Ayhan Kuzu,

Objectives:Medical textbooks suggest that the frequency of bowel sounds may be altered by performing auscultation after palpation or percussion. We hypothesize that the frequency of bowel sounds is not affected by the order of abdominal examination. Material and Methods:Both healthy volunteers (n= 80) and patients (n= 100) were enrolled in ... Read more >>

Turk J Surg (Turkish journal of surgery)
[2019, 35(4):309-313]

Cited: 0 times

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Nigella sativa oil and thymoquinone reduce oxidative stress in the brain tissue of rats exposed to total head irradiation.

Elif Demir, Seyithan Taysi, Hasan Ulusal, Davut Sinan Kaplan, Kadir Cinar, Mehmet Tarakcioglu,

Purpose: To evaluate the antioxidant and radio-protective effects of Nigella sativa oil (NSO) and thymoquinone (TQ) on radiation-induced oxidative stress in brain tissue.Materials and methods: Fifty-four Sprague-Dawley rats were divided into six groups to test the radio-protective effectiveness of Nigella sativa oil and thymoquine administered by either orogastric tube or ... Read more >>

Int J Radiat Biol (International journal of radiation biology)
[2020, 96(2):228-235]

Cited: 0 times

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Ceria supported ruthenium(0) nanoparticles: Highly efficient catalysts in oxygen evolution reaction.

Elif Demir, Serdar Akbayrak, Ahmet M Önal, Saim Özkar,

Ruthenium(0) nanoparticles were successfully prepared on the surface of ceria (Ru0/CeO2) and used as catalysts on glassy carbon electrode (GCE) in oxygen evolution reaction (OER) from water electrolysis at room temperature. Ru0/CeO2 on GCE exhibits high catalytic activity for OER in alkaline solution. It provides a low onset potential of ... Read more >>

J Colloid Interface Sci (Journal of colloid and interface science)
[2019, 534:704-710]

Cited: 1 time

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Titania, zirconia and hafnia supported ruthenium(0) nanoparticles: Highly active hydrogen evolution catalysts.

Elif Demir, Serdar Akbayrak, Ahmet M Önal, Saim Özkar,

Designing a cost-effective catalyst with high activity and stability for hydrogen evolution reaction (2H+ + 2e- → H2) is a big challenge due to increasing demand for energy. Herein, we report the electrocatalytic activity of glassy carbon electrodes with group 4 metal oxides (TiO2, ZrO2, HfO2) supported ruthenium(0) nanoparticles in hydrogen evolution reaction. Electrochemical ... Read more >>

J Colloid Interface Sci (Journal of colloid and interface science)
[2018, 531:570-577]

Cited: 0 times

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Nanoceria-Supported Ruthenium(0) Nanoparticles: Highly Active and Stable Catalysts for Hydrogen Evolution from Water.

Elif Demir, Serdar Akbayrak, Ahmet M Önal, Saim Özkar,

Ruthenium(0) nanoparticles supported on nanoceria (Ru0/CeO2) were prepared by reduction of Ru3+ ions on the surface of ceria using aqueous solution of NaBH4. The Ru0/CeO2 samples were characterized by advanced analytical tools and employed as electrocatalysts on the glassy carbon electrode (GCE) in hydrogen evolution from water. The GCE, modified ... Read more >>

ACS Appl Mater Interfaces (ACS applied materials & interfaces)
[2018, 10(7):6299-6308]

Cited: 3 times

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Radioprotective effect of thymoquinone on salivary gland of rats exposed to total cranial irradiation.

Mehmet Akyuz, Seyithan Taysi, Elif Baysal, Elif Demir, Hilal Alkis, Muslum Akan, Habip Binici, Zeynel Abidin Karatas,

The purpose of this study was to investigate the radioprotective effects of thymoquinone against radiation-induced damage in the salivary glands of rats exposed to total cranial gamma irradiation.Thirty-two Sprague-Dawley rats were divided into 4 groups to test the radioprotective effectiveness of thymoquinone by intraperitoneal injection. An appropriate control group was ... Read more >>

Head Neck (Head & neck)
[2017, 39(10):2027-2035]

Cited: 3 times

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Pazopanib induced unilateral posterior reversible encephalopathy syndrome.

Beyza Muhsine Arslan, Arsida Bajrami, Elif Demir, Murat Cabalar, Vildan Yayla,

Posterior reversible encephalopathy syndrome (PRES) is a reversible clinical and neuroradiological syndrome which may appear at any age and characterized by headache, altered consciousness, seizures, and cortical blindness. The exact incidence is still unknown. The most commonly identified causes include hypertensive encephalopathy, eclampsia, and some cytotoxic drugs. Vasogenic edema related ... Read more >>

Ideggyogy Sz (Ideggyogyaszati szemle)
[2017, 70(3-4):140-144]

Cited: 1 time

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The effects of Nigella sativa oil, thymoquinone, propolis, and caffeic acid phenethyl ester on radiation-induced cataract.

Elif Demir, Seyithan Taysi, Behcet Al, Tuncer Demir, Seydi Okumus, Oguzhan Saygili, Edibe Saricicek, Ahmet Dirier, Muslum Akan, Mehmet Tarakcioglu, Cahit Bagci,

The aim of this study was to investigate the antioxidant and radioprotective effects of propolis, caffeic acid phenethyl ester (CAPE), Nigella sativa oil (NSO), and thymoquinone (TQ) against ionizing radiation-induced cataracts in lens after total cranium irradiation of rats with single dose of 5-Gy cobalt-60 gamma rays.A total of 74 ... Read more >>

Wien. Klin. Wochenschr. (Wiener klinische Wochenschrift)
[2016, 128(Suppl 8):587-595]

Cited: 1 time

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The radio-protective effects of caffeic acid phenethyl ester and thymoquinone in rats exposed to total head irradiation.

Oztekin Cikman, Seyithan Taysi, Murat Taner Gulsen, Elif Demir, Muslum Akan, Halit Diril, Hasan Ali Kiraz, Muammer Karaayvaz, Mehmet Tarakcioglu,

Many cancer patients treated with radiotherapy suffer severe side effects during and after their treatment. The aim of this study was to investigate the effects of irradiation and the addition of caffeic acid phenethyl ester (CAPE) and thymoquinone (TQ) on the oxidant/antioxidant system in the liver tissue of irradiated rats.A ... Read more >>

Wien. Klin. Wochenschr. (Wiener klinische Wochenschrift)
[2015, 127(3-4):103-108]

Cited: 5 times

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The radioprotective effect of Nigella sativa on nitrosative stress in lens tissue in radiation-induced cataract in rat.

Seyithan Taysi, Zainab Khaleel Abdulrahman, Seydi Okumus, Elif Demir, Tuncer Demir, Muslum Akan, Edibe Saricicek, Vahap Saricicek, Adnan Aksoy, Mehmet Tarakcioglu,

The aim of this study was to investigate the antioxidant and radioprotective effects of Nigella sativa oil (NSO) and thymoquinone (TQ) against ionizing radiation-induced cataracts in lens after total cranium irradiation (IR) of rats with a single dose of 5 gray (Gy).Seventy-four Sprague-Dawley rats were used for the experiment. The ... Read more >>

Cutan Ocul Toxicol (Cutaneous and ocular toxicology)
[2015, 34(2):101-106]

Cited: 4 times

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Zinc administration modulates radiation-induced oxidative injury in lens of rat.

Seyithan Taysi, Seydi Okumus, Mehmet Akyuz, Naim Uzun, Adnan Aksoy, Elif Demir, Mustafa Orkmez, Mehmet Tarakcioglu, Mustafa Adli,

BACKGROUND:The aim of this study was to evaluate the antioxidant role of zinc (Zn) against radiation-induced cataract in the rat lens after total cranial irradiation with a single 5 Gray (Gy) dose of gamma irradiation. MATERIALS AND METHODS:Twenty-one Sprague-Dawley rats were used for the experiment. The control group did not ... Read more >>

(Pharmacognosy magazine)
[2012, 8(32):245-249]

Cited: 8 times

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Comparison of meperidine versus hyoscine during colonoscopy in the elderly: a prospective randomized study.

Barlas Sulu, Baris Dogu Yildiz, Cagatay Buyukuysal, Elif Demir, Yusuf Gunerhan,

BACKGROUND: Colonoscopy is the gold standard in diagnosis of diseases of the colon. Sedation and antispasmodic agents are recommended during colonoscopy. Age is a limiting factor when the surgeon is deciding whether to use these medications or not. SUBJECTS AND METHODS: One hundred twenty patients older than 65 years of ... Read more >>

J Laparoendosc Adv Surg Tech A (Journal of laparoendoscopic & advanced surgical techniques. Part A)
[2012, 22(7):631-634]

Cited: 2 times

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The effects of oral Ginkgo biloba supplementation on radiation-induced oxidative injury in the lens of rat.

Seydi Okumus, Seyithan Taysi, Mustafa Orkmez, Edibe Saricicek, Elif Demir, Mustafa Adli, Behcet Al,

BACKGROUND:The aim of this study was to evaluate the antioxidant role of Ginkgo biloba (GB) against radiation-induced cataract in the rat lens after total cranial irradiation with a single 5 Gray (Gy) dose of gamma irradiation. MATERIALS AND METHODS:Twenty-four Sprague-Dawley rats were used for the experiment. The rats were randomly ... Read more >>

(Pharmacognosy magazine)
[2011, 7(26):141-145]

Cited: 12 times

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Antioxidative status and lipid peroxidation in kidney tissue of rats fed with vitamin B(6)-deficient diet.

Mustafa Keles, Behcet Al, Kenan Gumustekin, Berna Demircan, Isa Ozbey, Mehmet Akyuz, Adnan Yilmaz, Elif Demir, Abdullah Uyanik, Tevfik Ziypak, Seyithan Taysi,

INTRODUCTION: The aim of this study was to evaluate lipid peroxidation (LP) and free radical scavenging enzyme activities in kidney tissue of vitamin B(6)-deficient rats. MATERIAL AND METHODS: The rats were divided into control and vitamin B(6)-deficient groups. After 4 weeks of feeding, animals in all groups were anesthetized by ... Read more >>

Ren Fail (Renal failure)
[2010, 32(5):618-622]

Cited: 13 times

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Green evolution and dynamic adaptations revealed by genomes of the marine picoeukaryotes Micromonas.

Alexandra Z Worden, Jae-Hyeok Lee, Thomas Mock, Pierre Rouzé, Melinda P Simmons, Andrea L Aerts, Andrew E Allen, Marie L Cuvelier, Evelyne Derelle, Meredith V Everett, Elodie Foulon, Jane Grimwood, Heidrun Gundlach, Bernard Henrissat, Carolyn Napoli, Sarah M McDonald, Micaela S Parker, Stephane Rombauts, Aasf Salamov, Peter Von Dassow, Jonathan H Badger, Pedro M Coutinho, Elif Demir, Inna Dubchak, Chelle Gentemann, Wenche Eikrem, Jill E Gready, Uwe John, William Lanier, Erika A Lindquist, Susan Lucas, Klaus F X Mayer, Herve Moreau, Fabrice Not, Robert Otillar, Olivier Panaud, Jasmyn Pangilinan, Ian Paulsen, Benoit Piegu, Aaron Poliakov, Steven Robbens, Jeremy Schmutz, Eve Toulza, Tania Wyss, Alexander Zelensky, Kemin Zhou, E Virginia Armbrust, Debashish Bhattacharya, Ursula W Goodenough, Yves Van de Peer, Igor V Grigoriev,

Picoeukaryotes are a taxonomically diverse group of organisms less than 2 micrometers in diameter. Photosynthetic marine picoeukaryotes in the genus Micromonas thrive in ecosystems ranging from tropical to polar and could serve as sentinel organisms for biogeochemical fluxes of modern oceans during climate change. These broadly distributed primary producers belong ... Read more >>

Science (Science (New York, N.Y.))
[2009, 324(5924):268-272]

Cited: 298 times

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Protists are microbes too: a perspective.

David A Caron, Alexandra Z Worden, Peter D Countway, Elif Demir, Karla B Heidelberg,

Our understanding of the composition and activities of microbial communities from diverse habitats on our planet has improved enormously during the past decade, spurred on largely by advances in molecular biology. Much of this research has focused on the bacteria, and to a lesser extent on the archaea and viruses, ... Read more >>

ISME J (The ISME journal)
[2009, 3(1):4-12]

Cited: 53 times

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Assessment of microzooplankton grazing on Heterosigma akashiwo using a species-specific approach combining quantitative real-time PCR (QPCR) and dilution methods.

Elif Demir, Kathryn J Coyne, Martina A Doblin, Sara M Handy, David A Hutchins,

Delaware's Inland Bays (DIB) are subject to numerous mixed blooms of harmful raphidophytes each year, and Heterosigma akashiwo is one of the consistently occurring species. Often, Chattonella subsalsa, C. cf. verruculosa, and Fibrocapsa japonica co-occur with H. akashiwo, indicating a dynamic consortium of raphidophyte species. In this study, microzooplankton grazing ... Read more >>

Microb. Ecol. (Microbial ecology)
[2008, 55(4):583-594]

Cited: 8 times

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Experimental and theoretical studies on the functionalization reactions of 4-benzoyl-1,5-diphenyl-1H-pyrazole-3-carboxylic acid and acid chloride with 2,3-diaminopyridine.

Ismail Yildirim, Fatma Kandemirli, Elif Demir,

The 1H-pyrazole-3-carboxylic acid 2 was converted in good yield (69%) into the corresponding 1H-pyrazole-3-carboxamide 5 via reaction of the acid chloride 3 with 2,3- diaminopyridine (4). A different product, the 3H-imidazo[4,5-b] pyridine derivative 6, was formed from the reaction of 3 with 4 and base in benzene for 5 hours. ... Read more >>

Molecules (Molecules (Basel, Switzerland))
[2005, 10(3):559-571]

Cited: 0 times

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